:root {
    --primary-blue: #00629B;
    --secondary-blue: #003B5C;
    --accent-orange: #FF6B35;
    --dark-bg: #2D2D2D;
    --text-dark: #333333;
    --text-light: #FFFFFF;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: #FFFFFF;
    color: var(--text-dark);
    line-height: 1.6;
}

/* 导航栏 - 与主站一致 */
.global-nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 80px;
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    padding: 0 6%;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-logo {
    height: 55px;
    margin-right: 2.5rem;
    transition: transform 0.4s ease;
}

.nav-menu {
    flex: 1;
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.nav-item {
    position: relative;
    padding: 0.8rem 1.2rem;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color var(--transition-base);
}

.nav-item.active {
    color: var(--primary-blue);
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-blue);
    transition: all var(--transition-base);
}

.nav-item:hover::after {
    width: 100%;
    left: 0;
}

/* 主要内容区 */
.main-content {
    padding-top: 100px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 6% 4rem;
}

/* 关于我们标题部分 */
.about-header {
    text-align: center;
    margin-bottom: 4rem;
}

.about-header h1 {
    font-size: 2.8rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.about-header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-dark);
    opacity: 0.9;
}

/* 关于卡片部分 */
.about-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-bottom: 5rem;
}

.about-card {
    background: #FFFFFF;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.card-image {
    height: 220px;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-card:hover .card-image img {
    transform: scale(1.05);
}

.card-content {
    padding: 2rem;
}

.card-content h2 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card-content p {
    color: var(--text-dark);
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.read-more {
    display: inline-block;
    color: var(--primary-blue);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-base);
}

.read-more:hover {
    color: var(--secondary-blue);
}

.read-more i {
    margin-left: 5px;
    transition: transform var(--transition-base);
}

.read-more:hover i {
    transform: translateX(3px);
}

/* 我们的使命部分 */
.our-mission {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--text-light);
    padding: 5rem 6%;
    border-radius: 12px;
    margin-bottom: 5rem;
    position: relative;
    overflow: hidden;
}

.mission-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.mission-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.mission-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.mission-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="white"><circle cx="25" cy="25" r="3"/><circle cx="75" cy="25" r="3"/><circle cx="25" cy="75" r="3"/><circle cx="75" cy="75" r="3"/></svg>');
    background-size: 50px 50px;
}

/* 团队部分 */
.team-section {
    margin-bottom: 5rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-dark);
    opacity: 0.8;
    max-width: 700px;
    margin: 0 auto;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.team-member {
    background: #FFFFFF;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
    text-align: center;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.member-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 2rem auto 1.5rem;
    overflow: hidden;
    border: 3px solid var(--primary-blue);
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-info {
    padding: 0 1.5rem 2rem;
}

.member-info h3 {
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.member-info p.position {
    color: var(--secondary-blue);
    font-weight: 500;
    margin-bottom: 1rem;
}

.member-info p.bio {
    color: var(--text-dark);
    opacity: 0.8;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--secondary-blue);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .global-nav {
        height: 70px;
        padding: 0 5%;
    }

    .nav-menu {
        display: none;
    }

    .about-header h1 {
        font-size: 2.4rem;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 80px 5% 3rem;
    }

    .about-header h1 {
        font-size: 2rem;
    }

    .about-header p {
        font-size: 1rem;
    }

    .about-cards {
        grid-template-columns: 1fr;
    }

    .mission-content h2 {
        font-size: 1.8rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }
}
